import React, { Component } from 'react'
import 

export default class index extends Component {
    render() {
        return (
            <div>
                <h2>{store.getState().n}</h2>
                <select>
                    <option>2</option>
                    <option>4</option>
                    <option>6</option>
                </select>
                <button onClick={this.add}>++</button>
                <button onClick={this.dis}>--</button>
                <button onClick={this.addAsync}>2s++</button>
            </div>
        )
    }
    add = () => { }
    dis = () => { }
    addAsync = () => { }
}
